1542762221 has 24 divisors (see below), whose sum is σ = 2087108352. Its totient is φ = 1109671200.

The previous prime is 1542762197. The next prime is 1542762229. The reversal of 1542762221 is 1222672451.

It is not a de Polignac number, because 1542762221 - 2²² = 1538567917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542762229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59045 + ... + 81066.

It is an arithmetic number, because the mean of its divisors is an integer number (86962848).

Almost surely, 2^1542762221 is an apocalyptic number.

1542762221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1542762221 is a deficient number, since it is larger than the sum of its proper divisors (544346131).

1542762221 is a wasteful number, since it uses less digits than its factorization.

1542762221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140153 (or 140142 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 1542762221 is about 39278.0119277949. The cubic root of 1542762221 is about 1155.4903737851.

The spelling of 1542762221 in words is "one billion, five hundred forty-two million, seven hundred sixty-two thousand, two hundred twenty-one".