1225316379 has 16 divisors (see below), whose sum is σ = 1876930560. Its totient is φ = 696512640.

The previous prime is 1225316369. The next prime is 1225316399. The reversal of 1225316379 is 9736135221.

It is a happy number.

It is not a de Polignac number, because 1225316379 - 2⁹ = 1225315867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225316369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148734 + ... + 156755.

It is an arithmetic number, because the mean of its divisors is an integer number (117308160).

Almost surely, 2^1225316379 is an apocalyptic number.

1225316379 is a deficient number, since it is larger than the sum of its proper divisors (651614181).

1225316379 is a wasteful number, since it uses less digits than its factorization.

1225316379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305690.

The product of its digits is 68040, while the sum is 39.

The square root of 1225316379 is about 35004.5194082136. The cubic root of 1225316379 is about 1070.0795873488.

The spelling of 1225316379 in words is "one billion, two hundred twenty-five million, three hundred sixteen thousand, three hundred seventy-nine".