1370012857 has 4 divisors (see below), whose sum is σ = 1386519120. Its totient is φ = 1353506596.

The previous prime is 1370012843. The next prime is 1370012887. The reversal of 1370012857 is 7582100731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7582100731 = 8861 ⋅855671.

It is a cyclic number.

It is not a de Polignac number, because 1370012857 - 2¹⁵ = 1369980089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1370012807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8253007 + ... + 8253172.

It is an arithmetic number, because the mean of its divisors is an integer number (346629780).

Almost surely, 2^1370012857 is an apocalyptic number.

It is an amenable number.

1370012857 is a deficient number, since it is larger than the sum of its proper divisors (16506263).

1370012857 is an equidigital number, since it uses as much as digits as its factorization.

1370012857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16506262.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 1370012857 is about 37013.6847260577. The cubic root of 1370012857 is about 1110.6440157980.

The spelling of 1370012857 in words is "one billion, three hundred seventy million, twelve thousand, eight hundred fifty-seven".