1251925 has 6 divisors (see below), whose sum is σ = 1552418. Its totient is φ = 1001520.

The previous prime is 1251923. The next prime is 1251937. The reversal of 1251925 is 5291521.

It can be written as a sum of positive squares in 3 ways, for example, as 223729 + 1028196 = 473^2 + 1014^2 .

It is not a de Polignac number, because 1251925 - 2¹ = 1251923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 50077 = 1251925 / (1 + 2 + 5 + 1 + 9 + 2 + 5).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1251925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25014 + ... + 25063.

2^1251925 is an apocalyptic number.

It is an amenable number.

1251925 is a deficient number, since it is larger than the sum of its proper divisors (300493).

1251925 is an equidigital number, since it uses as much as digits as its factorization.

1251925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50087 (or 50082 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 1251925 is about 1118.8945437350. The cubic root of 1251925 is about 107.7770032970. Note that the first 3 decimals are identical.

It can be divided in two parts, 12519 and 25, that added together give a square (12544 = 112²).

The spelling of 1251925 in words is "one million, two hundred fifty-one thousand, nine hundred twenty-five".