1250528969 has 4 divisors (see below), whose sum is σ = 1255284096. Its totient is φ = 1245773844.

The previous prime is 1250528963. The next prime is 1250528989. The reversal of 1250528969 is 9698250521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9698250521 = 31 ⋅312846791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250528969 is a prime.

It is a super-2 number, since 2×1250528969² = 3127645404616405922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250528963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377169 + ... + 2377694.

It is an arithmetic number, because the mean of its divisors is an integer number (313821024).

Almost surely, 2^1250528969 is an apocalyptic number.

It is an amenable number.

1250528969 is a deficient number, since it is larger than the sum of its proper divisors (4755127).

1250528969 is an equidigital number, since it uses as much as digits as its factorization.

1250528969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755126.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 1250528969 is about 35362.8190194164. The cubic root of 1250528969 is about 1077.3692741422.

The spelling of 1250528969 in words is "one billion, two hundred fifty million, five hundred twenty-eight thousand, nine hundred sixty-nine".