149797571 has 16 divisors (see below), whose sum is σ = 191811840. Its totient is φ = 113568480.

The previous prime is 149797541. The next prime is 149797579. The reversal of 149797571 is 175797941.

It is a cyclic number.

It is not a de Polignac number, because 149797571 - 2²⁶ = 82688707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149797579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23441 + ... + 29138.

It is an arithmetic number, because the mean of its divisors is an integer number (11988240).

Almost surely, 2^149797571 is an apocalyptic number.

149797571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149797571 is a deficient number, since it is larger than the sum of its proper divisors (42014269).

149797571 is a wasteful number, since it uses less digits than its factorization.

149797571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52634.

The product of its digits is 555660, while the sum is 50.

The square root of 149797571 is about 12239.1817945482. The cubic root of 149797571 is about 531.0901626458.

The spelling of 149797571 in words is "one hundred forty-nine million, seven hundred ninety-seven thousand, five hundred seventy-one".