1070685557 has 4 divisors (see below), whose sum is σ = 1070797260. Its totient is φ = 1070573856.

The previous prime is 1070685493. The next prime is 1070685601. The reversal of 1070685557 is 7555860701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7555860701 = 19 ⋅397676879.

It can be written as a sum of positive squares in 2 ways, for example, as 61606801 + 1009078756 = 7849^2 + 31766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1070685557 - 2⁶ = 1070685493 is a prime.

It is a super-2 number, since 2×1070685557² = 2292735123936800498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1070684557) 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, 39968 + ... + 61145.

It is an arithmetic number, because the mean of its divisors is an integer number (267699315).

Almost surely, 2^1070685557 is an apocalyptic number.

It is an amenable number.

1070685557 is a deficient number, since it is larger than the sum of its proper divisors (111703).

1070685557 is a wasteful number, since it uses less digits than its factorization.

1070685557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111702.

The product of its (nonzero) digits is 294000, while the sum is 44.

The square root of 1070685557 is about 32721.3318341415. The cubic root of 1070685557 is about 1023.0275156179.

The spelling of 1070685557 in words is "one billion, seventy million, six hundred eighty-five thousand, five hundred fifty-seven".