1249642402 has 8 divisors (see below), whose sum is σ = 1875116700. Its totient is φ = 624603504.

The previous prime is 1249642399. The next prime is 1249642411. The reversal of 1249642402 is 2042469421.

It can be written as a sum of positive squares in 2 ways, for example, as 1249551801 + 90601 = 35349^2 + 301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1249642402² = 3123212265752659208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101577 + ... + 113212.

Almost surely, 2^1249642402 is an apocalyptic number.

1249642402 is a deficient number, since it is larger than the sum of its proper divisors (625474298).

1249642402 is a wasteful number, since it uses less digits than its factorization.

1249642402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217700.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 1249642402 is about 35350.2814981720. The cubic root of 1249642402 is about 1077.1146123473.

The spelling of 1249642402 in words is "one billion, two hundred forty-nine million, six hundred forty-two thousand, four hundred two".