1491412925 has 12 divisors (see below), whose sum is σ = 1894459476. Its totient is φ = 1164028800.

The previous prime is 1491412921. The next prime is 1491412931. The reversal of 1491412925 is 5292141941.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 122190916 + 1369222009 = 11054^2 + 37003^2 .

It is not a de Polignac number, because 1491412925 - 2² = 1491412921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491412921) 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, 726494 + ... + 728543.

It is an arithmetic number, because the mean of its divisors is an integer number (157871623).

Almost surely, 2^1491412925 is an apocalyptic number.

It is an amenable number.

1491412925 is a deficient number, since it is larger than the sum of its proper divisors (403046551).

1491412925 is a wasteful number, since it uses less digits than its factorization.

1491412925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455088 (or 1455083 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 1491412925 is about 38618.8156861393. The cubic root of 1491412925 is about 1142.5256726767.

The spelling of 1491412925 in words is "one billion, four hundred ninety-one million, four hundred twelve thousand, nine hundred twenty-five".