1251490 has 8 divisors (see below), whose sum is σ = 2252700. Its totient is φ = 500592.

The previous prime is 1251463. The next prime is 1251527. The reversal of 1251490 is 941521.

It can be written as a sum of positive squares in 2 ways, for example, as 1229881 + 21609 = 1109^2 + 147^2 .

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

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, 62565 + ... + 62584.

2^1251490 is an apocalyptic number.

1251490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251490 is a deficient number, since it is larger than the sum of its proper divisors (1001210).

1251490 is a wasteful number, since it uses less digits than its factorization.

1251490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125156.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1251490 is about 1118.7001385537. The cubic root of 1251490 is about 107.7645189423.

The spelling of 1251490 in words is "one million, two hundred fifty-one thousand, four hundred ninety".