1252690 has 8 divisors (see below), whose sum is σ = 2254860. Its totient is φ = 501072.

The previous prime is 1252681. The next prime is 1252711. The reversal of 1252690 is 962521.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 529 = 1119^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1252690² = 3138464472200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62625 + ... + 62644.

2^1252690 is an apocalyptic number.

1252690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1252690 is a deficient number, since it is larger than the sum of its proper divisors (1002170).

1252690 is a wasteful number, since it uses less digits than its factorization.

1252690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125276.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1252690 is about 1119.2363468008. The cubic root of 1252690 is about 107.7989515286.

The spelling of 1252690 in words is "one million, two hundred fifty-two thousand, six hundred ninety".