1045640407 has 4 divisors (see below), whose sum is σ = 1195017616. Its totient is φ = 896263200.

The previous prime is 1045640381. The next prime is 1045640423. The reversal of 1045640407 is 7040465401.

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

It is not a de Polignac number, because 1045640407 - 2¹¹ = 1045638359 is a prime.

It is a super-2 number, since 2×1045640407² = 2186727721502251298, 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 (1045640107) 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, 74688594 + ... + 74688607.

It is an arithmetic number, because the mean of its divisors is an integer number (298754404).

Almost surely, 2^1045640407 is an apocalyptic number.

1045640407 is a deficient number, since it is larger than the sum of its proper divisors (149377209).

1045640407 is an equidigital number, since it uses as much as digits as its factorization.

1045640407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149377208.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1045640407 is about 32336.3635401385. The cubic root of 1045640407 is about 1014.9877151562.

The spelling of 1045640407 in words is "one billion, forty-five million, six hundred forty thousand, four hundred seven".