1057215747 has 16 divisors (see below), whose sum is σ = 1626054912. Its totient is φ = 598476000.

The previous prime is 1057215739. The next prime is 1057215787. The reversal of 1057215747 is 7475127501.

It is a happy number.

1057215747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1057215747 - 2³ = 1057215739 is a prime.

It is a super-2 number, since 2×1057215747² = 2235410271409536018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1057215787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233004 + ... + 237497.

It is an arithmetic number, because the mean of its divisors is an integer number (101628432).

Almost surely, 2^1057215747 is an apocalyptic number.

1057215747 is a deficient number, since it is larger than the sum of its proper divisors (568839165).

1057215747 is a wasteful number, since it uses less digits than its factorization.

1057215747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470618.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 1057215747 is about 32514.8542515571. The cubic root of 1057215747 is about 1018.7193163654.

The spelling of 1057215747 in words is "one billion, fifty-seven million, two hundred fifteen thousand, seven hundred forty-seven".