1051724978 has 4 divisors (see below), whose sum is σ = 1577587470. Its totient is φ = 525862488.

The previous prime is 1051724959. The next prime is 1051724981. The reversal of 1051724978 is 8794271501.

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

It can be written as a sum of positive squares in only one way, i.e., 996475489 + 55249489 = 31567^2 + 7433^2 .

It is a super-2 number, since 2×1051724978² = 2212250858698200968, 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, 262931243 + ... + 262931246.

Almost surely, 2^1051724978 is an apocalyptic number.

1051724978 is a deficient number, since it is larger than the sum of its proper divisors (525862492).

1051724978 is an equidigital number, since it uses as much as digits as its factorization.

1051724978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525862491.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 1051724978 is about 32430.3095575728. The cubic root of 1051724978 is about 1016.9526432031.

The spelling of 1051724978 in words is "one billion, fifty-one million, seven hundred twenty-four thousand, nine hundred seventy-eight".