125421490 has 32 divisors (see below), whose sum is σ = 235703664. Its totient is φ = 48003840.

The previous prime is 125421469. The next prime is 125421511. The reversal of 125421490 is 94124521.

It is an interprime number because it is at equal distance from previous prime (125421469) and next prime (125421511).

It can be written as a sum of positive squares in 8 ways, for example, as 78375609 + 47045881 = 8853^2 + 6859^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19792 + ... + 25348.

Almost surely, 2^125421490 is an apocalyptic number.

125421490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125421490 is a deficient number, since it is larger than the sum of its proper divisors (110282174).

125421490 is a wasteful number, since it uses less digits than its factorization.

125421490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 125421490 is about 11199.1736302283. The cubic root of 125421490 is about 500.5613561893.

The spelling of 125421490 in words is "one hundred twenty-five million, four hundred twenty-one thousand, four hundred ninety".