1556124401 has 8 divisors (see below), whose sum is σ = 1679467944. Its totient is φ = 1433301120.

The previous prime is 1556124389. The next prime is 1556124413. The reversal of 1556124401 is 1044216551.

It is an interprime number because it is at equal distance from previous prime (1556124389) and next prime (1556124413).

It can be written as a sum of positive squares in 4 ways, for example, as 295874401 + 1260250000 = 17201^2 + 35500^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1556124401 - 2⁶ = 1556124337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1556174401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123836 + ... + 135821.

It is an arithmetic number, because the mean of its divisors is an integer number (209933493).

Almost surely, 2^1556124401 is an apocalyptic number.

It is an amenable number.

1556124401 is a deficient number, since it is larger than the sum of its proper divisors (123343543).

1556124401 is a wasteful number, since it uses less digits than its factorization.

1556124401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260131.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1556124401 is about 39447.7426603855. The cubic root of 1556124401 is about 1158.8167683629.

The spelling of 1556124401 in words is "one billion, five hundred fifty-six million, one hundred twenty-four thousand, four hundred one".