1501250661 has 6 divisors (see below), whose sum is σ = 2168473190. Its totient is φ = 1000833768.

The previous prime is 1501250659. The next prime is 1501250669. The reversal of 1501250661 is 1660521051.

It is a happy number.

1501250661 is a `hidden beast` number, since 150 + 1 + 2 + 506 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1384286436 + 116964225 = 37206^2 + 10815^2 .

It is not a de Polignac number, because 1501250661 - 2¹ = 1501250659 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 (1501250669) 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, 83402806 + ... + 83402823.

Almost surely, 2^1501250661 is an apocalyptic number.

It is an amenable number.

1501250661 is a deficient number, since it is larger than the sum of its proper divisors (667222529).

1501250661 is a wasteful number, since it uses less digits than its factorization.

1501250661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166805635 (or 166805632 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1501250661 is about 38745.9760620377. The cubic root of 1501250661 is about 1145.0322984984.

The spelling of 1501250661 in words is "one billion, five hundred one million, two hundred fifty thousand, six hundred sixty-one".