402079261 has 8 divisors (see below), whose sum is σ = 425824704. Its totient is φ = 378855840.

The previous prime is 402079241. The next prime is 402079289. The reversal of 402079261 is 162970204.

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 402079261 - 2¹⁵ = 402046493 is a prime.

It is a super-2 number, since 2×402079261² = 323335464252612242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402079201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128920 + ... + 132001.

It is an arithmetic number, because the mean of its divisors is an integer number (53228088).

Almost surely, 2^402079261 is an apocalyptic number.

It is an amenable number.

402079261 is a deficient number, since it is larger than the sum of its proper divisors (23745443).

402079261 is a wasteful number, since it uses less digits than its factorization.

402079261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261011.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 402079261 is about 20051.9141480309. The cubic root of 402079261 is about 738.0807711431.

The spelling of 402079261 in words is "four hundred two million, seventy-nine thousand, two hundred sixty-one".