125155501 has 4 divisors (see below), whose sum is σ = 127818432. Its totient is φ = 122492572.

The previous prime is 125155487. The next prime is 125155517. The reversal of 125155501 is 105551521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105551521 = 17 ⋅6208913.

It is a cyclic number.

It is not a de Polignac number, because 125155501 - 2¹¹ = 125153453 is a prime.

It is a super-2 number, since 2×125155501² = 31327798861122002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125155601) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1331395 + ... + 1331488.

It is an arithmetic number, because the mean of its divisors is an integer number (31954608).

Almost surely, 2^125155501 is an apocalyptic number.

It is an amenable number.

125155501 is a deficient number, since it is larger than the sum of its proper divisors (2662931).

125155501 is an equidigital number, since it uses as much as digits as its factorization.

125155501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662930.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 125155501 is about 11187.2919421994. The cubic root of 125155501 is about 500.2072487507.

The spelling of 125155501 in words is "one hundred twenty-five million, one hundred fifty-five thousand, five hundred one".