1057651442 has 4 divisors (see below), whose sum is σ = 1586477166. Its totient is φ = 528825720.

The previous prime is 1057651421. The next prime is 1057651453. The reversal of 1057651442 is 2441567501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2441567501 = 283 ⋅8627447.

It can be written as a sum of positive squares in only one way, i.e., 539679361 + 517972081 = 23231^2 + 22759^2 .

It is a super-2 number, since 2×1057651442² = 2237253145529358728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264412859 + ... + 264412862.

Almost surely, 2^1057651442 is an apocalyptic number.

1057651442 is a deficient number, since it is larger than the sum of its proper divisors (528825724).

1057651442 is an equidigital number, since it uses as much as digits as its factorization.

1057651442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528825723.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 1057651442 is about 32521.5534991796. The cubic root of 1057651442 is about 1018.8592404869.

The spelling of 1057651442 in words is "one billion, fifty-seven million, six hundred fifty-one thousand, four hundred forty-two".