1257072836 has 24 divisors (see below), whose sum is σ = 2252712000. Its totient is φ = 613462752.

The previous prime is 1257072823. The next prime is 1257072853. The reversal of 1257072836 is 6382707521.

It is a junction number, because it is equal to n+sod(n) for n = 1257072793 and 1257072802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417665 + ... + 420663.

It is an arithmetic number, because the mean of its divisors is an integer number (93863000).

Almost surely, 2^1257072836 is an apocalyptic number.

It is an amenable number.

1257072836 is a deficient number, since it is larger than the sum of its proper divisors (995639164).

1257072836 is a wasteful number, since it uses less digits than its factorization.

1257072836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483 (or 5481 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1257072836 is about 35455.2229720813. Note that the first 3 decimals coincide. The cubic root of 1257072836 is about 1079.2452534261.

The spelling of 1257072836 in words is "one billion, two hundred fifty-seven million, seventy-two thousand, eight hundred thirty-six".