1053157421 has 4 divisors (see below), whose sum is σ = 1064014812. Its totient is φ = 1042300032.

The previous prime is 1053157411. The next prime is 1053157433. The reversal of 1053157421 is 1247513501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216501796 + 836655625 = 14714^2 + 28925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053157421 - 2²² = 1048963117 is a prime.

It is a super-2 number, since 2×1053157421² = 2218281106814742482, 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 (1053157411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428550 + ... + 5428743.

It is an arithmetic number, because the mean of its divisors is an integer number (266003703).

Almost surely, 2^1053157421 is an apocalyptic number.

It is an amenable number.

1053157421 is a deficient number, since it is larger than the sum of its proper divisors (10857391).

1053157421 is an equidigital number, since it uses as much as digits as its factorization.

1053157421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857390.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1053157421 is about 32452.3869846272. The cubic root of 1053157421 is about 1017.4141281840.

The spelling of 1053157421 in words is "one billion, fifty-three million, one hundred fifty-seven thousand, four hundred twenty-one".