1520274730 has 16 divisors (see below), whose sum is σ = 2946994344. Its totient is φ = 561332160.

The previous prime is 1520274727. The next prime is 1520274731. The reversal of 1520274730 is 374720251.

It can be written as a sum of positive squares in 4 ways, for example, as 1279993729 + 240281001 = 35777^2 + 15501^2 .

It is a super-2 number, since 2×1520274730² = 4622470509353145800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520274692 and 1520274701.

It is not an unprimeable number, because it can be changed into a prime (1520274731) 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, 5847081 + ... + 5847340.

Almost surely, 2^1520274730 is an apocalyptic number.

1520274730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1520274730 is a deficient number, since it is larger than the sum of its proper divisors (1426719614).

1520274730 is a wasteful number, since it uses less digits than its factorization.

1520274730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11694441.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1520274730 is about 38990.7005579536. The cubic root of 1520274730 is about 1149.8486833043.

Adding to 1520274730 its reverse (374720251), we get a palindrome (1894994981).

The spelling of 1520274730 in words is "one billion, five hundred twenty million, two hundred seventy-four thousand, seven hundred thirty".