402505941 has 4 divisors (see below), whose sum is σ = 536674592. Its totient is φ = 268337292.

The previous prime is 402505933. The next prime is 402505969. The reversal of 402505941 is 149505204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 402505941 - 2³ = 402505933 is a prime.

It is a super-2 number, since 2×402505941² = 324022065080590962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402505899 and 402505908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402505931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67084321 + ... + 67084326.

It is an arithmetic number, because the mean of its divisors is an integer number (134168648).

Almost surely, 2^402505941 is an apocalyptic number.

It is an amenable number.

402505941 is a deficient number, since it is larger than the sum of its proper divisors (134168651).

402505941 is a wasteful number, since it uses less digits than its factorization.

402505941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134168650.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 402505941 is about 20062.5507102163. The cubic root of 402505941 is about 738.3417586333.

The spelling of 402505941 in words is "four hundred two million, five hundred five thousand, nine hundred forty-one".