642415582 has 4 divisors (see below), whose sum is σ = 963623376. Its totient is φ = 321207790.

The previous prime is 642415559. The next prime is 642415591. The reversal of 642415582 is 285514246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 285514246 = 2 ⋅142757123.

It is a super-3 number, since 3×642415582³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160603894 + ... + 160603897.

It is an arithmetic number, because the mean of its divisors is an integer number (240905844).

Almost surely, 2^642415582 is an apocalyptic number.

642415582 is a deficient number, since it is larger than the sum of its proper divisors (321207794).

642415582 is a wasteful number, since it uses less digits than its factorization.

642415582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321207793.

The product of its digits is 76800, while the sum is 37.

The square root of 642415582 is about 25345.9184485392. The cubic root of 642415582 is about 862.8567259814.

The spelling of 642415582 in words is "six hundred forty-two million, four hundred fifteen thousand, five hundred eighty-two".