1520242999 has 8 divisors (see below), whose sum is σ = 1658821248. Its totient is φ = 1381727160.

The previous prime is 1520242993. The next prime is 1520243077. The reversal of 1520242999 is 9992420251.

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

It is not a de Polignac number, because 1520242999 - 2⁵ = 1520242967 is a prime.

It is a super-2 number, since 2×1520242999² = 4622277552017028002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520242993) 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, 45894 + ... + 71740.

It is an arithmetic number, because the mean of its divisors is an integer number (207352656).

Almost surely, 2^1520242999 is an apocalyptic number.

1520242999 is a deficient number, since it is larger than the sum of its proper divisors (138578249).

1520242999 is a wasteful number, since it uses less digits than its factorization.

1520242999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31205.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1520242999 is about 38990.2936511127. The cubic root of 1520242999 is about 1149.8406834120.

The spelling of 1520242999 in words is "one billion, five hundred twenty million, two hundred forty-two thousand, nine hundred ninety-nine".