1512172340 has 36 divisors (see below), whose sum is σ = 3694023396. Its totient is φ = 518458752.

The previous prime is 1512172331. The next prime is 1512172349. The reversal of 1512172340 is 432712151.

It is an interprime number because it is at equal distance from previous prime (1512172331) and next prime (1512172349).

It can be written as a sum of positive squares in 2 ways, for example, as 833361424 + 678810916 = 28868^2 + 26054^2 .

It is a super-2 number, since 2×1512172340² = 4573330371722151200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1512172349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 770537 + ... + 772496.

It is an arithmetic number, because the mean of its divisors is an integer number (102611761).

Almost surely, 2^1512172340 is an apocalyptic number.

1512172340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1512172340 is an abundant number, since it is smaller than the sum of its proper divisors (2181851056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1512172340 is a wasteful number, since it uses less digits than its factorization.

1512172340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543056 (or 1543047 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1512172340 is about 38886.6601805812. The cubic root of 1512172340 is about 1147.8023157528.

Adding to 1512172340 its reverse (432712151), we get a palindrome (1944884491).

The spelling of 1512172340 in words is "one billion, five hundred twelve million, one hundred seventy-two thousand, three hundred forty".