1252640190 has 16 divisors (see below), whose sum is σ = 3006336528. Its totient is φ = 334037376.

The previous prime is 1252640161. The next prime is 1252640261. The reversal of 1252640190 is 910462521.

It is a super-2 number, since 2×1252640190² = 3138214891206472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 41754673 = 1252640190 / (1 + 2 + 5 + 2 + 6 + 4 + 0 + 1 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20877307 + ... + 20877366.

It is an arithmetic number, because the mean of its divisors is an integer number (187896033).

Almost surely, 2^1252640190 is an apocalyptic number.

1252640190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1252640190 is an abundant number, since it is smaller than the sum of its proper divisors (1753696338).

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

1252640190 is a wasteful number, since it uses less digits than its factorization.

1252640190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41754683.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1252640190 is about 35392.6572893305. The cubic root of 1252640190 is about 1077.9752272685.

The spelling of 1252640190 in words is "one billion, two hundred fifty-two million, six hundred forty thousand, one hundred ninety".