1540597642 has 8 divisors (see below), whose sum is σ = 2333776932. Its totient is φ = 762672000.

The previous prime is 1540597633. The next prime is 1540597651. The reversal of 1540597642 is 2467950451.

It is an interprime number because it is at equal distance from previous prime (1540597633) and next prime (1540597651).

It can be written as a sum of positive squares in 2 ways, for example, as 955489921 + 585107721 = 30911^2 + 24189^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813159 + ... + 3813562.

Almost surely, 2^1540597642 is an apocalyptic number.

1540597642 is a deficient number, since it is larger than the sum of its proper divisors (793179290).

1540597642 is a wasteful number, since it uses less digits than its factorization.

1540597642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626824.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 1540597642 is about 39250.4476662369. The cubic root of 1540597642 is about 1154.9497156447.

The spelling of 1540597642 in words is "one billion, five hundred forty million, five hundred ninety-seven thousand, six hundred forty-two".