1251051461 has 8 divisors (see below), whose sum is σ = 1365039648. Its totient is φ = 1137106000.

The previous prime is 1251051433. The next prime is 1251051467. The reversal of 1251051461 is 1641501521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251051461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251051461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251051467) 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, 106406 + ... + 117576.

It is an arithmetic number, because the mean of its divisors is an integer number (170629956).

Almost surely, 2^1251051461 is an apocalyptic number.

1251051461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1251051461 is a deficient number, since it is larger than the sum of its proper divisors (113988187).

1251051461 is a wasteful number, since it uses less digits than its factorization.

1251051461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21363.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1251051461 is about 35370.2058376821. The cubic root of 1251051461 is about 1077.5193009070.

Adding to 1251051461 its reverse (1641501521), we get a palindrome (2892552982).

The spelling of 1251051461 in words is "one billion, two hundred fifty-one million, fifty-one thousand, four hundred sixty-one".