126991464 has 64 divisors (see below), whose sum is σ = 342748800. Its totient is φ = 39088896.

The previous prime is 126991451. The next prime is 126991477. The reversal of 126991464 is 464199621.

It is an interprime number because it is at equal distance from previous prime (126991451) and next prime (126991477).

It is a super-2 number, since 2×126991464² = 32253663857726592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12042 + ... + 19974.

It is an arithmetic number, because the mean of its divisors is an integer number (5355450).

Almost surely, 2^126991464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126991464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171374400).

126991464 is an abundant number, since it is smaller than the sum of its proper divisors (215757336).

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

126991464 is a wasteful number, since it uses less digits than its factorization.

126991464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7994 (or 7990 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 126991464 is about 11269.0489394625. The cubic root of 126991464 is about 502.6413077506.

The spelling of 126991464 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, four hundred sixty-four".