149981601 has 24 divisors (see below), whose sum is σ = 253774944. Its totient is φ = 77911680.

The previous prime is 149981563. The next prime is 149981603. The reversal of 149981601 is 106189941.

It is not a de Polignac number, because 149981601 - 2⁶ = 149981537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149981601.

It is not an unprimeable number, because it can be changed into a prime (149981603) 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 23 ways as a sum of consecutive naturals, for example, 44760 + ... + 47993.

It is an arithmetic number, because the mean of its divisors is an integer number (10573956).

Almost surely, 2^149981601 is an apocalyptic number.

149981601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149981601 is a deficient number, since it is larger than the sum of its proper divisors (103793343).

149981601 is a wasteful number, since it uses less digits than its factorization.

149981601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92781 (or 92774 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 149981601 is about 12246.6975548513. The cubic root of 149981601 is about 531.3075594197.

The spelling of 149981601 in words is "one hundred forty-nine million, nine hundred eighty-one thousand, six hundred one".