1057651394 has 8 divisors (see below), whose sum is σ = 1589512080. Its totient is φ = 527814036.

The previous prime is 1057651391. The next prime is 1057651421. The reversal of 1057651394 is 4931567501.

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

It is a super-2 number, since 2×1057651394² = 2237252942460286472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1057651391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504524 + ... + 506615.

It is an arithmetic number, because the mean of its divisors is an integer number (198689010).

Almost surely, 2^1057651394 is an apocalyptic number.

1057651394 is a deficient number, since it is larger than the sum of its proper divisors (531860686).

1057651394 is a wasteful number, since it uses less digits than its factorization.

1057651394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011664.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1057651394 is about 32521.5527612075. The cubic root of 1057651394 is about 1018.8592250738.

The spelling of 1057651394 in words is "one billion, fifty-seven million, six hundred fifty-one thousand, three hundred ninety-four".