149940025 has 27 divisors (see below), whose sum is σ = 194579343. Its totient is φ = 114613200.

The previous prime is 149940023. The next prime is 149940047. The reversal of 149940025 is 520049941.

The square root of 149940025 is 12245.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 53978409 + 95961616 = 7347^2 + 9796^2 .

It is not a de Polignac number, because 149940025 - 2¹ = 149940023 is a prime.

It is a super-2 number, since 2×149940025² = 44964022194001250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149940023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1897936 + ... + 1898014.

Almost surely, 2^149940025 is an apocalyptic number.

149940025 is the 12245-th square number.

149940025 is the 6123-rd centered octagonal number.

It is an amenable number.

149940025 is a deficient number, since it is larger than the sum of its proper divisors (44639318).

149940025 is an frugal number, since it uses more digits than its factorization.

149940025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The cubic root of 149940025 is about 531.2584607649.

Adding to 149940025 its reverse (520049941), we get a palindrome (669989966).

The spelling of 149940025 in words is "one hundred forty-nine million, nine hundred forty thousand, twenty-five".