1621001142 has 48 divisors (see below), whose sum is σ = 3637550592. Its totient is φ = 521369520.

The previous prime is 1621001099. The next prime is 1621001167. The reversal of 1621001142 is 2411001261.

1621001142 is a `hidden beast` number, since 1 + 621 + 0 + 0 + 1 + 1 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46573 + ... + 73559.

It is an arithmetic number, because the mean of its divisors is an integer number (75782304).

Almost surely, 2^1621001142 is an apocalyptic number.

1621001142 is an abundant number, since it is smaller than the sum of its proper divisors (2016549450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621001142 is a wasteful number, since it uses less digits than its factorization.

1621001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27113 (or 27110 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1621001142 is about 40261.6584606248. The cubic root of 1621001142 is about 1174.7021770005.

The spelling of 1621001142 in words is "one billion, six hundred twenty-one million, one thousand, one hundred forty-two".