52406642 has 4 divisors (see below), whose sum is σ = 78609966. Its totient is φ = 26203320.

The previous prime is 52406633. The next prime is 52406687. The reversal of 52406642 is 24660425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52113961 + 292681 = 7219^2 + 541^2 .

It is a super-2 number, since 2×52406642² = 5492912251432328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13101659 + ... + 13101662.

Almost surely, 2^52406642 is an apocalyptic number.

52406642 is a deficient number, since it is larger than the sum of its proper divisors (26203324).

52406642 is a wasteful number, since it uses less digits than its factorization.

52406642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26203323.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 52406642 is about 7239.2431924891. The cubic root of 52406642 is about 374.2215365112.

The spelling of 52406642 in words is "fifty-two million, four hundred six thousand, six hundred forty-two".