1264654091 has 2 divisors, whose sum is σ = 1264654092. Its totient is φ = 1264654090.

The previous prime is 1264654063. The next prime is 1264654099. The reversal of 1264654091 is 1904564621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264654091 - 2²² = 1260459787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264654099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632327045 + 632327046.

It is an arithmetic number, because the mean of its divisors is an integer number (632327046).

Almost surely, 2^1264654091 is an apocalyptic number.

1264654091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264654091 is an equidigital number, since it uses as much as digits as its factorization.

1264654091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1264654091 is about 35561.9753528962. The cubic root of 1264654091 is about 1081.4105058662.

The spelling of 1264654091 in words is "one billion, two hundred sixty-four million, six hundred fifty-four thousand, ninety-one".