1357400057 has 6 divisors (see below), whose sum is σ = 1469847582. Its totient is φ = 1252984512.

The previous prime is 1357400053. The next prime is 1357400063. The reversal of 1357400057 is 7500047531.

It can be written as a sum of positive squares in 3 ways, for example, as 96510976 + 1260889081 = 9824^2 + 35509^2 .

It is not a de Polignac number, because 1357400057 - 2² = 1357400053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1357399996 and 1357400032.

It is not an unprimeable number, because it can be changed into a prime (1357400053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4015808 + ... + 4016145.

It is an arithmetic number, because the mean of its divisors is an integer number (244974597).

Almost surely, 2^1357400057 is an apocalyptic number.

It is an amenable number.

1357400057 is a deficient number, since it is larger than the sum of its proper divisors (112447525).

1357400057 is an equidigital number, since it uses as much as digits as its factorization.

1357400057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031979 (or 8031966 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 1357400057 is about 36842.9105392069. The cubic root of 1357400057 is about 1107.2251815706.

Adding to 1357400057 its reverse (7500047531), we get a palindrome (8857447588).

The spelling of 1357400057 in words is "one billion, three hundred fifty-seven million, four hundred thousand, fifty-seven".