402012245 has 8 divisors (see below), whose sum is σ = 484915416. Its totient is φ = 319942656.

The previous prime is 402012229. The next prime is 402012263. The reversal of 402012245 is 542210204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2292196 + 399720049 = 1514^2 + 19993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402012245 - 2⁴ = 402012229 is a prime.

It is a super-2 number, since 2×402012245² = 323227690259880050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207332 + ... + 209261.

It is an arithmetic number, because the mean of its divisors is an integer number (60614427).

Almost surely, 2^402012245 is an apocalyptic number.

It is an amenable number.

402012245 is a deficient number, since it is larger than the sum of its proper divisors (82903171).

402012245 is a wasteful number, since it uses less digits than its factorization.

402012245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416791.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402012245 is about 20050.2430159836. The cubic root of 402012245 is about 738.0397626703.

Adding to 402012245 its reverse (542210204), we get a palindrome (944222449).

The spelling of 402012245 in words is "four hundred two million, twelve thousand, two hundred forty-five".