1255642002 has 12 divisors (see below), whose sum is σ = 2720557710. Its totient is φ = 418547328.

The previous prime is 1255642001. The next prime is 1255642007. The reversal of 1255642002 is 2002465521.

1255642002 is a `hidden beast` number, since 12 + 5 + 5 + 642 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 904866561 + 350775441 = 30081^2 + 18729^2 .

It is not an unprimeable number, because it can be changed into a prime (1255642001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34878927 + ... + 34878962.

Almost surely, 2^1255642002 is an apocalyptic number.

1255642002 is an abundant number, since it is smaller than the sum of its proper divisors (1464915708).

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

1255642002 is a wasteful number, since it uses less digits than its factorization.

1255642002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69757897 (or 69757894 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1255642002 is about 35435.0391844005. The cubic root of 1255642002 is about 1078.8356226764.

The spelling of 1255642002 in words is "one billion, two hundred fifty-five million, six hundred forty-two thousand, two".