642662435 has 32 divisors (see below), whose sum is σ = 838200960. Its totient is φ = 471702528.

The previous prime is 642662429. The next prime is 642662453. The reversal of 642662435 is 534266246.

It is a cyclic number.

It is not a de Polignac number, because 642662435 - 2¹² = 642658339 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309581 + ... + 311649.

It is an arithmetic number, because the mean of its divisors is an integer number (26193780).

Almost surely, 2^642662435 is an apocalyptic number.

642662435 is a deficient number, since it is larger than the sum of its proper divisors (195538525).

642662435 is a wasteful number, since it uses less digits than its factorization.

642662435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207.

The product of its digits is 207360, while the sum is 38.

The square root of 642662435 is about 25350.7876603470. The cubic root of 642662435 is about 862.9672315488.

The spelling of 642662435 in words is "six hundred forty-two million, six hundred sixty-two thousand, four hundred thirty-five".