101520149 has 6 divisors (see below), whose sum is σ = 102173526. Its totient is φ = 100870920.

The previous prime is 101520121. The next prime is 101520157. The reversal of 101520149 is 941025101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98863249 + 2656900 = 9943^2 + 1630^2 .

It is not a de Polignac number, because 101520149 - 2⁸ = 101519893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101520109) 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 5 ways as a sum of consecutive naturals, for example, 24659 + ... + 28479.

It is an arithmetic number, because the mean of its divisors is an integer number (17028921).

Almost surely, 2^101520149 is an apocalyptic number.

It is an amenable number.

101520149 is a deficient number, since it is larger than the sum of its proper divisors (653377).

101520149 is an frugal number, since it uses more digits than its factorization.

101520149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147 (or 3984 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 101520149 is about 10075.7207682627. The cubic root of 101520149 is about 466.4990340658.

The spelling of 101520149 in words is "one hundred one million, five hundred twenty thousand, one hundred forty-nine".