102070557 has 8 divisors (see below), whose sum is σ = 151215680. Its totient is φ = 68047020.

The previous prime is 102070537. The next prime is 102070561. The reversal of 102070557 is 755070201.

102070557 is a `hidden beast` number, since 102 + 0 + 7 + 0 + 557 = 666.

It is not a de Polignac number, because 102070557 - 2¹⁰ = 102069533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3780391 = 102070557 / (1 + 0 + 2 + 0 + 7 + 0 + 5 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102070557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102070537) 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, 1890169 + ... + 1890222.

It is an arithmetic number, because the mean of its divisors is an integer number (18901960).

Almost surely, 2^102070557 is an apocalyptic number.

It is an amenable number.

102070557 is a deficient number, since it is larger than the sum of its proper divisors (49145123).

102070557 is an equidigital number, since it uses as much as digits as its factorization.

102070557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780400 (or 3780394 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 102070557 is about 10102.9974265067. The cubic root of 102070557 is about 467.3405818269.

The spelling of 102070557 in words is "one hundred two million, seventy thousand, five hundred fifty-seven".