1224157825 has 12 divisors (see below), whose sum is σ = 1655952048. Its totient is φ = 890296400.

The previous prime is 1224157807. The next prime is 1224157877. The reversal of 1224157825 is 5287514221.

It is a happy number.

It is not a de Polignac number, because 1224157825 - 2²¹ = 1222060673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2225467 + ... + 2226016.

It is an arithmetic number, because the mean of its divisors is an integer number (137996004).

Almost surely, 2^1224157825 is an apocalyptic number.

It is an amenable number.

1224157825 is a deficient number, since it is larger than the sum of its proper divisors (431794223).

1224157825 is a wasteful number, since it uses less digits than its factorization.

1224157825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451504 (or 4451499 counting only the distinct ones).

The product of its digits is 44800, while the sum is 37.

The square root of 1224157825 is about 34987.9668600506. The cubic root of 1224157825 is about 1069.7422225275.

The spelling of 1224157825 in words is "one billion, two hundred twenty-four million, one hundred fifty-seven thousand, eight hundred twenty-five".