12749451 has 32 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 7042560.

The previous prime is 12749449. The next prime is 12749453. The reversal of 12749451 is 15494721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12749449) and next prime (12749453).

It is not a de Polignac number, because 12749451 - 2¹ = 12749449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12749453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48346 + ... + 48608.

It is an arithmetic number, because the mean of its divisors is an integer number (632016).

Almost surely, 2^12749451 is an apocalyptic number.

12749451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12749451 is a deficient number, since it is larger than the sum of its proper divisors (7475061).

12749451 is a wasteful number, since it uses less digits than its factorization.

12749451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its digits is 10080, while the sum is 33.

The square root of 12749451 is about 3570.6373380673. The cubic root of 12749451 is about 233.6130832867.

The spelling of 12749451 in words is "twelve million, seven hundred forty-nine thousand, four hundred fifty-one".