1050140721 has 48 divisors (see below), whose sum is σ = 1677113984. Its totient is φ = 572479488.

The previous prime is 1050140701. The next prime is 1050140747. The reversal of 1050140721 is 1270410501.

It is a happy number.

It is not a de Polignac number, because 1050140721 - 2¹⁰ = 1050139697 is a prime.

It is a super-2 number, since 2×1050140721² = 2205591067804799682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1050140701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1712811 + ... + 1713423.

Almost surely, 2^1050140721 is an apocalyptic number.

It is an amenable number.

1050140721 is a deficient number, since it is larger than the sum of its proper divisors (626973263).

1050140721 is an equidigital number, since it uses as much as digits as its factorization.

1050140721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 1050140721 is about 32405.8747914634. The cubic root of 1050140721 is about 1016.4417605998.

The spelling of 1050140721 in words is "one billion, fifty million, one hundred forty thousand, seven hundred twenty-one".