1260421507 has 4 divisors (see below), whose sum is σ = 1260492736. Its totient is φ = 1260350280.

The previous prime is 1260421493. The next prime is 1260421511. The reversal of 1260421507 is 7051240621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7051240621 = 2339 ⋅3014639.

It is a cyclic number.

It is not a de Polignac number, because 1260421507 - 2²⁷ = 1126203779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260421517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13582 + ... + 52012.

It is an arithmetic number, because the mean of its divisors is an integer number (315123184).

Almost surely, 2^1260421507 is an apocalyptic number.

1260421507 is a deficient number, since it is larger than the sum of its proper divisors (71229).

1260421507 is an equidigital number, since it uses as much as digits as its factorization.

1260421507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71228.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1260421507 is about 35502.4155093706. The cubic root of 1260421507 is about 1080.2027245761.

The spelling of 1260421507 in words is "one billion, two hundred sixty million, four hundred twenty-one thousand, five hundred seven".