264145642 has 4 divisors (see below), whose sum is σ = 396218466. Its totient is φ = 132072820.

The previous prime is 264145621. The next prime is 264145669. The reversal of 264145642 is 246541462.

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., 251888641 + 12257001 = 15871^2 + 3501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 264145598 and 264145607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66036409 + ... + 66036412.

Almost surely, 2^264145642 is an apocalyptic number.

264145642 is a deficient number, since it is larger than the sum of its proper divisors (132072824).

264145642 is a wasteful number, since it uses less digits than its factorization.

264145642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132072823.

The product of its digits is 46080, while the sum is 34.

The square root of 264145642 is about 16252.5580140481. The cubic root of 264145642 is about 641.6248119174.

The spelling of 264145642 in words is "two hundred sixty-four million, one hundred forty-five thousand, six hundred forty-two".