1251567 has 12 divisors (see below), whose sum is σ = 1839240. Its totient is φ = 819888.

The previous prime is 1251533. The next prime is 1251571. The reversal of 1251567 is 7651521.

It is not a de Polignac number, because 1251567 - 2¹¹ = 1249519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 648 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (153270).

2^1251567 is an apocalyptic number.

1251567 is a deficient number, since it is larger than the sum of its proper divisors (587673).

1251567 is a wasteful number, since it uses less digits than its factorization.

1251567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422 (or 2419 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1251567 is about 1118.7345529660. The cubic root of 1251567 is about 107.7667290272.

The spelling of 1251567 in words is "one million, two hundred fifty-one thousand, five hundred sixty-seven".