1642723465 has 8 divisors (see below), whose sum is σ = 1979123328. Its totient is φ = 1308942000.

The previous prime is 1642723429. The next prime is 1642723501. The reversal of 1642723465 is 5643272461.

It is an interprime number because it is at equal distance from previous prime (1642723429) and next prime (1642723501).

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

It is a de Polignac number, because none of the positive numbers 2^k-1642723465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653217 + ... + 655726.

It is an arithmetic number, because the mean of its divisors is an integer number (247390416).

Almost surely, 2^1642723465 is an apocalyptic number.

It is an amenable number.

1642723465 is a deficient number, since it is larger than the sum of its proper divisors (336399863).

1642723465 is a wasteful number, since it uses less digits than its factorization.

1642723465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309199.

The product of its digits is 241920, while the sum is 40.

The square root of 1642723465 is about 40530.5251014590. The cubic root of 1642723465 is about 1179.9261336985.

The spelling of 1642723465 in words is "one billion, six hundred forty-two million, seven hundred twenty-three thousand, four hundred sixty-five".