125221507 has 8 divisors (see below), whose sum is σ = 137160000. Its totient is φ = 113791104.

The previous prime is 125221477. The next prime is 125221511. The reversal of 125221507 is 705122521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125221507 - 2¹¹ = 125219459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125221567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126507 + ... + 127492.

It is an arithmetic number, because the mean of its divisors is an integer number (17145000).

Almost surely, 2^125221507 is an apocalyptic number.

125221507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

125221507 is a deficient number, since it is larger than the sum of its proper divisors (11938493).

125221507 is a wasteful number, since it uses less digits than its factorization.

125221507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254045.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 125221507 is about 11190.2415970344. The cubic root of 125221507 is about 500.2951683836.

The spelling of 125221507 in words is "one hundred twenty-five million, two hundred twenty-one thousand, five hundred seven".