1267055421 has 16 divisors (see below), whose sum is σ = 1714802688. Its totient is φ = 832028400.

The previous prime is 1267055401. The next prime is 1267055437. The reversal of 1267055421 is 1245507621.

It is not a de Polignac number, because 1267055421 - 2²⁶ = 1199946557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267055401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306156 + ... + 310266.

It is an arithmetic number, because the mean of its divisors is an integer number (107175168).

Almost surely, 2^1267055421 is an apocalyptic number.

It is an amenable number.

1267055421 is a deficient number, since it is larger than the sum of its proper divisors (447747267).

1267055421 is a wasteful number, since it uses less digits than its factorization.

1267055421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1267055421 is about 35595.7219480094. The cubic root of 1267055421 is about 1082.0945352306.

The spelling of 1267055421 in words is "one billion, two hundred sixty-seven million, fifty-five thousand, four hundred twenty-one".