149355861 has 16 divisors (see below), whose sum is σ = 206492160. Its totient is φ = 95924160.

The previous prime is 149355853. The next prime is 149355881. The reversal of 149355861 is 168553941.

It is not a de Polignac number, because 149355861 - 2³ = 149355853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149355821) 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, 17791 + ... + 24803.

It is an arithmetic number, because the mean of its divisors is an integer number (12905760).

Almost surely, 2^149355861 is an apocalyptic number.

It is an amenable number.

149355861 is a deficient number, since it is larger than the sum of its proper divisors (57136299).

149355861 is a wasteful number, since it uses less digits than its factorization.

149355861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276.

The product of its digits is 129600, while the sum is 42.

The square root of 149355861 is about 12221.1235571857. The cubic root of 149355861 is about 530.5676379479.

The spelling of 149355861 in words is "one hundred forty-nine million, three hundred fifty-five thousand, eight hundred sixty-one".