1551052642 has 4 divisors (see below), whose sum is σ = 2326578966. Its totient is φ = 775526320.

The previous prime is 1551052627. The next prime is 1551052661. The reversal of 1551052642 is 2462501551.

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., 866654721 + 684397921 = 29439^2 + 26161^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 387763159 + ... + 387763162.

Almost surely, 2^1551052642 is an apocalyptic number.

1551052642 is a deficient number, since it is larger than the sum of its proper divisors (775526324).

1551052642 is an equidigital number, since it uses as much as digits as its factorization.

1551052642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775526323.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1551052642 is about 39383.4056678698. The cubic root of 1551052642 is about 1157.5564500923.

The spelling of 1551052642 in words is "one billion, five hundred fifty-one million, fifty-two thousand, six hundred forty-two".