1061557157 has 8 divisors (see below), whose sum is σ = 1111929984. Its totient is φ = 1011535888.

The previous prime is 1061557127. The next prime is 1061557177. The reversal of 1061557157 is 7517551601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1061557157 - 2¹² = 1061553061 is a prime.

It is a super-2 number, since 2×1061557157² = 2253807195155845298, 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 1061557157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061557127) 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, 81698 + ... + 93795.

It is an arithmetic number, because the mean of its divisors is an integer number (138991248).

Almost surely, 2^1061557157 is an apocalyptic number.

It is an amenable number.

1061557157 is a deficient number, since it is larger than the sum of its proper divisors (50372827).

1061557157 is a wasteful number, since it uses less digits than its factorization.

1061557157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175779.

The product of its (nonzero) digits is 36750, while the sum is 38.

The square root of 1061557157 is about 32581.5462647186. The cubic root of 1061557157 is about 1020.1118540029. Note that the first 3 decimals are identical.

The spelling of 1061557157 in words is "one billion, sixty-one million, five hundred fifty-seven thousand, one hundred fifty-seven".