123151501 has 6 divisors (see below), whose sum is σ = 135365006. Its totient is φ = 111955800.

The previous prime is 123151481. The next prime is 123151517. The reversal of 123151501 is 105151321.

It can be written as a sum of positive squares in only one way, i.e., 104652900 + 18498601 = 10230^2 + 4301^2 .

It is not a de Polignac number, because 123151501 - 2²⁵ = 89597069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123151531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508770 + ... + 509011.

Almost surely, 2^123151501 is an apocalyptic number.

123151501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123151501 is a deficient number, since it is larger than the sum of its proper divisors (12213505).

123151501 is a wasteful number, since it uses less digits than its factorization.

123151501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017803 (or 1017792 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 123151501 is about 11097.3645970564. The cubic root of 123151501 is about 497.5230847095.

It can be divided in two parts, 12 and 3151501, that added together give a palindrome (3151513).

The spelling of 123151501 in words is "one hundred twenty-three million, one hundred fifty-one thousand, five hundred one".