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102122045 = 520424409
BaseRepresentation
bin1100001011001…
…00001000111101
321010011100002222
412011210020331
5202120401140
614044455125
72350010624
oct605441075
9233140088
10102122045
1152710893
122a24a4a5
131820765c
14d7c46bb
158e735b5
hex616423d

102122045 has 4 divisors (see below), whose sum is σ = 122546460. Its totient is φ = 81697632.

The previous prime is 102122039. The next prime is 102122057. The reversal of 102122045 is 540221201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31595641 + 70526404 = 5621^2 + 8398^2 .

It is a cyclic number.

It is not a de Polignac number, because 102122045 - 210 = 102121021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10212200 + ... + 10212209.

It is an arithmetic number, because the mean of its divisors is an integer number (30636615).

Almost surely, 2102122045 is an apocalyptic number.

It is an amenable number.

102122045 is a deficient number, since it is larger than the sum of its proper divisors (20424415).

102122045 is an equidigital number, since it uses as much as digits as its factorization.

102122045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20424414.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 102122045 is about 10105.5452599056. The cubic root of 102122045 is about 467.4191496586.

Adding to 102122045 its reverse (540221201), we get a palindrome (642343246).

The spelling of 102122045 in words is "one hundred two million, one hundred twenty-two thousand, forty-five".

Divisors: 1 5 20424409 102122045