72125519 has 4 divisors (see below), whose sum is σ = 73884720. Its totient is φ = 70366320.

The previous prime is 72125507. The next prime is 72125531. The reversal of 72125519 is 91552127.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72125507) and next prime (72125531).

It is a cyclic number.

It is not a de Polignac number, because 72125519 - 2⁴ = 72125503 is a prime.

It is a super-2 number, since 2×72125519² = 10404180982038722, 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 (72125569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879539 + ... + 879620.

It is an arithmetic number, because the mean of its divisors is an integer number (18471180).

Almost surely, 2^72125519 is an apocalyptic number.

72125519 is a deficient number, since it is larger than the sum of its proper divisors (1759201).

72125519 is a wasteful number, since it uses less digits than its factorization.

72125519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759200.

The product of its digits is 6300, while the sum is 32.

The square root of 72125519 is about 8492.6744315322. The cubic root of 72125519 is about 416.2583743021.

The spelling of 72125519 in words is "seventy-two million, one hundred twenty-five thousand, five hundred nineteen".