1421375615 has 8 divisors (see below), whose sum is σ = 1860709968. Its totient is φ = 1033727680.

The previous prime is 1421375611. The next prime is 1421375623. The reversal of 1421375615 is 5165731241.

It is a happy number.

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

It is not a de Polignac number, because 1421375615 - 2² = 1421375611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421375611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12921542 + ... + 12921651.

It is an arithmetic number, because the mean of its divisors is an integer number (232588746).

Almost surely, 2^1421375615 is an apocalyptic number.

1421375615 is a deficient number, since it is larger than the sum of its proper divisors (439334353).

1421375615 is a wasteful number, since it uses less digits than its factorization.

1421375615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25843209.

The product of its digits is 25200, while the sum is 35.

The square root of 1421375615 is about 37701.1354603545. The cubic root of 1421375615 is about 1124.3537002195.

The spelling of 1421375615 in words is "one billion, four hundred twenty-one million, three hundred seventy-five thousand, six hundred fifteen".