1251051 has 4 divisors (see below), whose sum is σ = 1668072. Its totient is φ = 834032.

The previous prime is 1251043. The next prime is 1251053. The reversal of 1251051 is 1501521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251051 - 2³ = 1251043 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251051.

It is not an unprimeable number, because it can be changed into a prime (1251053) 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, 208506 + ... + 208511.

It is an arithmetic number, because the mean of its divisors is an integer number (417018).

2^1251051 is an apocalyptic number.

1251051 is a deficient number, since it is larger than the sum of its proper divisors (417021).

1251051 is an equidigital number, since it uses as much as digits as its factorization.

1251051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417020.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1251051 is about 1118.5039114818. The cubic root of 1251051 is about 107.7519168555.

Adding to 1251051 its reverse (1501521), we get a palindrome (2752572).

It can be divided in two parts, 12510 and 51, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 1251051 in words is "one million, two hundred fifty-one thousand, fifty-one".