1071572421 has 8 divisors (see below), whose sum is σ = 1452185824. Its totient is φ = 702670320.

The previous prime is 1071572401. The next prime is 1071572423. The reversal of 1071572421 is 1242751701.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1071572421 - 2⁶ = 1071572357 is a prime.

It is a super-2 number, since 2×1071572421² = 2296534906895602482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071572423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2927611 + ... + 2927976.

It is an arithmetic number, because the mean of its divisors is an integer number (181523228).

Almost surely, 2^1071572421 is an apocalyptic number.

It is an amenable number.

1071572421 is a deficient number, since it is larger than the sum of its proper divisors (380613403).

1071572421 is an equidigital number, since it uses as much as digits as its factorization.

1071572421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855651.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 1071572421 is about 32734.8808001496. The cubic root of 1071572421 is about 1023.3099003878.

The spelling of 1071572421 in words is "one billion, seventy-one million, five hundred seventy-two thousand, four hundred twenty-one".