1351942557 has 16 divisors (see below), whose sum is σ = 2060634240. Its totient is φ = 772339392.

The previous prime is 1351942523. The next prime is 1351942567. The reversal of 1351942557 is 7552491531.

It is a happy number.

It is not a de Polignac number, because 1351942557 - 2⁸ = 1351942301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351942567) 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, 124419 + ... + 134847.

It is an arithmetic number, because the mean of its divisors is an integer number (128789640).

Almost surely, 2^1351942557 is an apocalyptic number.

It is an amenable number.

1351942557 is a deficient number, since it is larger than the sum of its proper divisors (708691683).

1351942557 is a wasteful number, since it uses less digits than its factorization.

1351942557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16612.

The product of its digits is 189000, while the sum is 42.

The square root of 1351942557 is about 36768.7714915796. The cubic root of 1351942557 is about 1105.7393022866.

The spelling of 1351942557 in words is "one billion, three hundred fifty-one million, nine hundred forty-two thousand, five hundred fifty-seven".