1580157 has 6 divisors (see below), whose sum is σ = 2282462. Its totient is φ = 1053432.

The previous prime is 1580141. The next prime is 1580171. The reversal of 1580157 is 7510851.

It can be written as a sum of positive squares in only one way, i.e., 962361 + 617796 = 981^2 + 786^2 .

It is not a de Polignac number, because 1580157 - 2⁴ = 1580141 is a prime.

It is a super-2 number, since 2×1580157² = 4993792289298, which contains 22 as substring.

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 1580157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1580107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87778 + ... + 87795.

2^1580157 is an apocalyptic number.

It is an amenable number.

1580157 is a deficient number, since it is larger than the sum of its proper divisors (702305).

1580157 is a wasteful number, since it uses less digits than its factorization.

1580157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175579 (or 175576 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 1580157 is about 1257.0429586931. The cubic root of 1580157 is about 116.4751861290.

The spelling of 1580157 in words is "one million, five hundred eighty thousand, one hundred fifty-seven".