149199525 has 36 divisors (see below), whose sum is σ = 268847748. Its totient is φ = 79092480.

The previous prime is 149199521. The next prime is 149199529. The reversal of 149199525 is 525991941.

It is an interprime number because it is at equal distance from previous prime (149199521) and next prime (149199529).

It can be written as a sum of positive squares in 6 ways, for example, as 408321 + 148791204 = 639^2 + 12198^2 .

It is not a de Polignac number, because 149199525 - 2² = 149199521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149199521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37009 + ... + 40841.

It is an arithmetic number, because the mean of its divisors is an integer number (7467993).

Almost surely, 2^149199525 is an apocalyptic number.

149199525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149199525 is a deficient number, since it is larger than the sum of its proper divisors (119648223).

149199525 is a wasteful number, since it uses less digits than its factorization.

149199525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022 (or 4014 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The square root of 149199525 is about 12214.7257439535. The cubic root of 149199525 is about 530.3824520890.

The spelling of 149199525 in words is "one hundred forty-nine million, one hundred ninety-nine thousand, five hundred twenty-five".