745405642 has 8 divisors (see below), whose sum is σ = 1119377376. Its totient is φ = 372279852.

The previous prime is 745405637. The next prime is 745405649. The reversal of 745405642 is 246504547.

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

It is a super-2 number, since 2×745405642² = 1111259142250864328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745405649) 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, 209278 + ... + 212809.

It is an arithmetic number, because the mean of its divisors is an integer number (139922172).

Almost surely, 2^745405642 is an apocalyptic number.

745405642 is a deficient number, since it is larger than the sum of its proper divisors (373971734).

745405642 is a wasteful number, since it uses less digits than its factorization.

745405642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422972.

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 745405642 is about 27302.1179031957. The cubic root of 745405642 is about 906.7012724380.

The spelling of 745405642 in words is "seven hundred forty-five million, four hundred five thousand, six hundred forty-two".