1071252621 has 24 divisors (see below), whose sum is σ = 1612811200. Its totient is φ = 710547552.

The previous prime is 1071252619. The next prime is 1071252641. The reversal of 1071252621 is 1262521701.

1071252621 is a `hidden beast` number, since 10 + 7 + 1 + 25 + 2 + 621 = 666.

It is not a de Polignac number, because 1071252621 - 2¹ = 1071252619 is a prime.

It is a super-2 number, since 2×1071252621² = 2295164355998739282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071252641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37281 + ... + 59433.

Almost surely, 2^1071252621 is an apocalyptic number.

It is an amenable number.

1071252621 is a deficient number, since it is larger than the sum of its proper divisors (541558579).

1071252621 is an equidigital number, since it uses as much as digits as its factorization.

1071252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22367 (or 22355 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1071252621 is about 32729.9957378549. The cubic root of 1071252621 is about 1023.2080914136.

It can be divided in two parts, 107125 and 2621, that added together give a triangular number (109746 = T₄₆₈).

The spelling of 1071252621 in words is "one billion, seventy-one million, two hundred fifty-two thousand, six hundred twenty-one".