1145621654 has 4 divisors (see below), whose sum is σ = 1718432484. Its totient is φ = 572810826.

The previous prime is 1145621591. The next prime is 1145621657. The reversal of 1145621654 is 4561265411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4561265411 = 1607 ⋅2838373.

It is a super-2 number, since 2×1145621654² = 2624897948227391432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145621657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286405412 + ... + 286405415.

It is an arithmetic number, because the mean of its divisors is an integer number (429608121).

Almost surely, 2^1145621654 is an apocalyptic number.

1145621654 is a deficient number, since it is larger than the sum of its proper divisors (572810830).

1145621654 is an equidigital number, since it uses as much as digits as its factorization.

1145621654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572810829.

The product of its digits is 28800, while the sum is 35.

The square root of 1145621654 is about 33847.0331639274. The cubic root of 1145621654 is about 1046.3582542753.

The spelling of 1145621654 in words is "one billion, one hundred forty-five million, six hundred twenty-one thousand, six hundred fifty-four".