1215469730 has 16 divisors (see below), whose sum is σ = 2282969664. Its totient is φ = 465049200.

The previous prime is 1215469727. The next prime is 1215469733. The reversal of 1215469730 is 379645121.

It is an interprime number because it is at equal distance from previous prime (1215469727) and next prime (1215469733).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1215469733) 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, 2642096 + ... + 2642555.

It is an arithmetic number, because the mean of its divisors is an integer number (142685604).

Almost surely, 2^1215469730 is an apocalyptic number.

1215469730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215469730 is a deficient number, since it is larger than the sum of its proper divisors (1067499934).

1215469730 is a wasteful number, since it uses less digits than its factorization.

1215469730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284681.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1215469730 is about 34863.5874516665. The cubic root of 1215469730 is about 1067.2054863450.

The spelling of 1215469730 in words is "one billion, two hundred fifteen million, four hundred sixty-nine thousand, seven hundred thirty".