125205490 has 32 divisors (see below), whose sum is σ = 228593664. Its totient is φ = 49371840.

The previous prime is 125205473. The next prime is 125205503. The reversal of 125205490 is 94502521.

It is a super-2 number, since 2×125205490² = 31352829452280200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394812 + ... + 395128.

It is an arithmetic number, because the mean of its divisors is an integer number (7143552).

Almost surely, 2^125205490 is an apocalyptic number.

125205490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125205490 is a deficient number, since it is larger than the sum of its proper divisors (103388174).

125205490 is a wasteful number, since it uses less digits than its factorization.

125205490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 125205490 is about 11189.5259059533. The cubic root of 125205490 is about 500.2738366662.

The spelling of 125205490 in words is "one hundred twenty-five million, two hundred five thousand, four hundred ninety".