1251131 has 16 divisors (see below), whose sum is σ = 1574400. Its totient is φ = 969408.

The previous prime is 1251121. The next prime is 1251157. The reversal of 1251131 is 1311521.

It is a cyclic number.

It is not a de Polignac number, because 1251131 - 2¹⁰ = 1250107 is a prime.

It is a super-2 number, since 2×1251131² = 3130657558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2855 + ... + 3263.

It is an arithmetic number, because the mean of its divisors is an integer number (98400).

2^1251131 is an apocalyptic number.

1251131 is a deficient number, since it is larger than the sum of its proper divisors (323269).

1251131 is a wasteful number, since it uses less digits than its factorization.

1251131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

The product of its digits is 30, while the sum is 14.

The square root of 1251131 is about 1118.5396729665. The cubic root of 1251131 is about 107.7542135830.

Adding to 1251131 its reverse (1311521), we get a palindrome (2562652).

The spelling of 1251131 in words is "one million, two hundred fifty-one thousand, one hundred thirty-one".