402540053 has 4 divisors (see below), whose sum is σ = 415525248. Its totient is φ = 389554860.

The previous prime is 402540041. The next prime is 402540107. The reversal of 402540053 is 350045204.

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 a cyclic number.

It is not a de Polignac number, because 402540053 - 2¹⁴ = 402523669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402540253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6492551 + ... + 6492612.

It is an arithmetic number, because the mean of its divisors is an integer number (103881312).

Almost surely, 2^402540053 is an apocalyptic number.

It is an amenable number.

402540053 is a deficient number, since it is larger than the sum of its proper divisors (12985195).

402540053 is a wasteful number, since it uses less digits than its factorization.

402540053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12985194.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 402540053 is about 20063.4008333582. The cubic root of 402540053 is about 738.3626159673.

Adding to 402540053 its reverse (350045204), we get a palindrome (752585257).

The spelling of 402540053 in words is "four hundred two million, five hundred forty thousand, fifty-three".