1320651242 has 16 divisors (see below), whose sum is σ = 2072320200. Its totient is φ = 630389760.

The previous prime is 1320651209. The next prime is 1320651247. The reversal of 1320651242 is 2421560231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1156068001 + 164583241 = 34001^2 + 12829^2 .

It is a super-2 number, since 2×1320651242² = 3488239405992285128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320651247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122759 + ... + 133082.

Almost surely, 2^1320651242 is an apocalyptic number.

1320651242 is a deficient number, since it is larger than the sum of its proper divisors (751668958).

1320651242 is a wasteful number, since it uses less digits than its factorization.

1320651242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255961.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1320651242 is about 36340.7655670598. The cubic root of 1320651242 is about 1097.1416816545.

The spelling of 1320651242 in words is "one billion, three hundred twenty million, six hundred fifty-one thousand, two hundred forty-two".