1501294981 has 2 divisors, whose sum is σ = 1501294982. Its totient is φ = 1501294980.

The previous prime is 1501294979. The next prime is 1501295023. The reversal of 1501294981 is 1894921051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844193025 + 657101956 = 29055^2 + 25634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1501294981 - 2¹ = 1501294979 is a prime.

It is a super-2 number, since 2×1501294981² = 4507773239951580722, which contains 22 as substring.

Together with 1501294979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501292981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750647490 + 750647491.

It is an arithmetic number, because the mean of its divisors is an integer number (750647491).

Almost surely, 2^1501294981 is an apocalyptic number.

It is an amenable number.

1501294981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501294981 is an equidigital number, since it uses as much as digits as its factorization.

1501294981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1501294981 is about 38746.5479881757. The cubic root of 1501294981 is about 1145.0435662885.

The spelling of 1501294981 in words is "one billion, five hundred one million, two hundred ninety-four thousand, nine hundred eighty-one".