1499157861 has 16 divisors (see below), whose sum is σ = 2065858560. Its totient is φ = 966026160.

The previous prime is 1499157859. The next prime is 1499157901. The reversal of 1499157861 is 1687519941.

It is not a de Polignac number, because 1499157861 - 2¹ = 1499157859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1499157811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70920 + ... + 89598.

It is an arithmetic number, because the mean of its divisors is an integer number (129116160).

Almost surely, 2^1499157861 is an apocalyptic number.

It is an amenable number.

1499157861 is a deficient number, since it is larger than the sum of its proper divisors (566700699).

1499157861 is a wasteful number, since it uses less digits than its factorization.

1499157861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19576.

The product of its digits is 544320, while the sum is 51.

The square root of 1499157861 is about 38718.9599679537. The cubic root of 1499157861 is about 1144.4999783377.

The spelling of 1499157861 in words is "one billion, four hundred ninety-nine million, one hundred fifty-seven thousand, eight hundred sixty-one".