1252027640 has 32 divisors (see below), whose sum is σ = 2820832560. Its totient is φ = 500140800.

The previous prime is 1252027633. The next prime is 1252027649. The reversal of 1252027640 is 467202521.

It is a happy number.

It is a super-2 number, since 2×1252027640² = 3135146422647939200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252027649) 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, 9875 + ... + 51005.

Almost surely, 2^1252027640 is an apocalyptic number.

1252027640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252027640 is an abundant number, since it is smaller than the sum of its proper divisors (1568804920).

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

1252027640 is a wasteful number, since it uses less digits than its factorization.

1252027640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41903 (or 41899 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 1252027640 is about 35384.0026000451. The cubic root of 1252027640 is about 1077.7994860906.

The spelling of 1252027640 in words is "one billion, two hundred fifty-two million, twenty-seven thousand, six hundred forty".