1242031605256 has 32 divisors (see below), whose sum is σ = 2514395683800. Its totient is φ = 571771699200.

The previous prime is 1242031605107. The next prime is 1242031605307. The reversal of 1242031605256 is 6525061302421.

It can be written as a sum of positive squares in 4 ways, for example, as 543118885156 + 698912720100 = 736966^2 + 836010^2 .

It is a super-3 number, since 3×1242031605256³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15309945 + ... + 15390856.

Almost surely, 2^{1242031605256} is an apocalyptic number.

It is an amenable number.

1242031605256 is an abundant number, since it is smaller than the sum of its proper divisors (1272364078544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242031605256 is a wasteful number, since it uses less digits than its factorization.

1242031605256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30701209 (or 30701205 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 1242031605256 its reverse (6525061302421), we get a palindrome (7767092907677).

The spelling of 1242031605256 in words is "one trillion, two hundred forty-two billion, thirty-one million, six hundred five thousand, two hundred fifty-six".