1156425979 has 2 divisors, whose sum is σ = 1156425980. Its totient is φ = 1156425978.

The previous prime is 1156425931. The next prime is 1156426001. The reversal of 1156425979 is 9795246511.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9795246511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156425979 - 2⁹ = 1156425467 is a prime.

It is a super-2 number, since 2×1156425979² = 2674642089812216882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1156425079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578212989 + 578212990.

It is an arithmetic number, because the mean of its divisors is an integer number (578212990).

Almost surely, 2^1156425979 is an apocalyptic number.

1156425979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156425979 is an equidigital number, since it uses as much as digits as its factorization.

1156425979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The square root of 1156425979 is about 34006.2638200670. The cubic root of 1156425979 is about 1049.6373589708.

The spelling of 1156425979 in words is "one billion, one hundred fifty-six million, four hundred twenty-five thousand, nine hundred seventy-nine".